In Codenames: Duet, a cooperative word game for two or more players, a key card gives you nine words to give clues for and three words your partner must avoid. A clue is only one word, but it can point to multiple words that you want your partner to guess. Your partner also gives you clues for the words you need to find. If you both find all the words before you run out of turns, you both win.Codenames: Duet includes 400 new words, however, if you own the original Codenames, you can use the word cards from the two games interchangeably.